<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			//设计一个程序，可以在3秒后定时打开百度页面，再3秒后关闭。
			setTimeout(function (){
				var a = window.open("https://www.baidu.com/","百度","width = 500,height = 500");
				document.write(111);
			},3000);
		</script>
	</body>
</html>
